Surface-indicator.



' PATENTED FEB. 5, 1907.

J. SIGRIST. SURFACE INDICATOR.

APPLICATION FILED JUNE 13,1906.

Z SHEETS-SHEET 1.

N0. 843,043. PATENTED FEB. 5, 1907.

J. SIGRIST. SURFACE INDICATOR. APPLICATION FILED JUNE 13.1906.

2 SHEETS-SHEET 2.

- out in the claims, and shown in the accomof New erecting and testing machinery of any kind, truingshafts, &c.

plane as UNITED 'lA'iEES PATENT @FhlCE.

JACOB SIG-RIST, or PUUGHKEEPSIE, New roan.

eunFAcE-moiomon.

Specification of Letters Eatent.

' Application filed June 13, 1906. Serial No. 321.506.

To all whom it may on the bottom of the casing in a vertical plane Be it known that I, JACOB SIGRIST, a citiwith said pivot-point are formed openings zen of the United States, residing at Pough- Pins B .and B are secured by mean'slof keepsie, in the county of Dutchess and State suitable reduced threaded portions in the York, have invented a new and useends of the members of the angled arm B, ful Im rovement in Surface-Indicators, of which the following is a specification.

This invention relates to an improvement in surface-indicators; and the object of the invention is to detect any unevenness in a plane surface, and a further object of the invention is an indicator of this type which will indicate [by means of an index-needle moving along a graduated scale the extent of the inequality, and the device can also be used in setting work on lathes, planers, shapers, milling-machines, drill-presses, or in opening A the pin B working in the side opening and the pin 13 projecting wardly through the bottom opening. These openings are of greater length than the diameters of those portions of the pins passing through the openings, so that thepins can play insaid openings when the armB is rocked upon its pivot-point.

At, the outer end of the pin B is formeda socket B into which maybethreadeda G by means of. which readily placed in position or removed.

the pointer G may be With- "lhe invention consists of the novel features of construction hereinafter described,.pointed cent the arm B a lever C, the lowerend of which rests adjacent the depending member of the angled arm B and in positionto be engaged by said arm upon its slightest movement. In the upper portion of the casing-A is pivoted a lever D, which adjacent its pivotal pointis provided with a nose D, w nose carries a roller D normally in engagement with the upper end of the lever G. A tapering index handle or needle E is pivoted at its lower end to the lower portion of the casing A, and its point or free end projects into the slot A back and forth in the said slot. The needle E adjacent its lower end carries a pin E, which is engaged by the lowerend portion of the lever D. A leaf-spring F the upper left-hand corner of panying drawings, in which- Figural is a pers ective view of the invention as applied to t 1e post of a lathe. Fig. 2 is a detail pers ective view showing the rear side of the in icator. Fig. .3 is a top plan view of the indicator. Fig. 4 is a section taken transversely through a holder intended to receive a bar carried by the indicator. Fig. 5 is a front elevation'oi the indicator with the iront face-plate removed. Fig. 6 is a central vertical section taken at rightangles to the view taken in Fig. 5. Fig. 7 is a vertical elevation of the indicator with both the irontplate and the index-needle removed. Fig. 8 is a vertical section through the indicator, taken at right angles to the section shownin Fig. 6. Fig. 9 is a side elevation showing a supporting-stand for holding the indicator. Fig. 10 are detail outline views of brackets by means of which the indicator may be, held for certain classes of Work.

In the drawings, A represents a casing havin a removable front plate and having av curve top slotted, as shown at A, said slot being formed parallel and adjacent the removable front and being provided along one margin with a graduated scale of any desired kind. Within this casing is pivotally mount-- ed angled arm B, arranged in the lower portion of the casing, and in one side of the cas ing substantially in the same horizontal the pivot-point of the arm B and in the casing A and its free end portion pin E and uponthe side of the lever D, and this sprin the needle and other mova le parts to their normal position and to hold them therein.

Upon the back of the casing A is formed or otherwise secured a disk H, upon which is secured a plate H a quarter-segment 'cut therefrom, thereby providing two radial shoulders H which are undercut by means of grooves H and at the meeting ends of these grooves is formed a socket H said socket being of course in the center of the disk H. A bar J is provided with a reduced portion J, which isadapteld to lie inthe grooves H and which carr es-fa bears also upon the the pin opposite tends to return Patented Feb. 5, 1907. i

and these pins extend outwardly through the point G, which is provided with a milled nut in the casing A is also pivoted at apoint adj a hich and extends downwardly and diagonally,

down I and is adapted to swing is secured 1n in the form of a disk having IIO thereby securing the bar J to the casing A bymeans of a ball-and-socket joint, the grooves H forming locking means for locking the bar in its adjusted position when throwing into either a vertical plane or a horizontal plane at right angles to the casing A, as shown in Fig. 2. I form also a holder for the bar J, consisting of a base-plate Kand a top plate K, which plates are provided with longitudin-al V-shaped grooves K formed in their opposing faces. The base-plate K adjacent its rear end is transversely slotted, as shown at K and the two plates are held together by an angled yoke L, the to of which rests upon the top of the upper p ate K, to which its side members are secured, and. these side members embrace the sides of the base-plate K and are connected by a pin L ,.whichpasses through and is capable of vertical movement in the slot K In Fig. 1 Lhave shown the indicator with the bar J held in the holder formed by the plates K and K, the said holder being held in a lathe-post M. In 'Fig. 9 I have shown a stand for supporting the indicator when 'usedwith certain classes of work, which stand consists of a base N, provided with apost N". A standard 0- is-pivotally connected tothe post N and is locked in its adjusted position by a set-screw O, and the post carries adjacent its upper end a perforated and.

slit lug O in which the bar J may be clamped by means of a thumb-nut O In Fig. 10 I have shown a supportingbracket P in two positions, by means of which the indicator may be supported when the indicator isused with a surface-gage, drillpress, or thelike.

The operation of the device will be readily understood, and it will also be obvious that it canbecoupled up for testing both horizontal and vertical plane surfaces, and when any unevenness of the surface being tested is presented tothe pins B or B or to the pointer G the angled arm B will be rocked its pivotal point, thus moving the lever u on G which in turn will depress the nose D of .-the lever D, and as this lever bears upon the pin E, carried by the needle E, the needle will be forced along the slot and the extent of the inequality upon the surface will be indicated by means of the scale.

Having now described my invention,what

, I claim as new, and desire to secure by Letters Patent, is

1. A device of the kind described comprising an indicating-needle, an angled arm, a lever ada ted to be actuated upon movement of t e angled arm, a second lever having a nose in en agement with an end of the first-mentioned lever, and a pin carried by the needle adapted to be engaged by the free end of the secondementioned lever.

2. A device of the kind described, comprising a casing having a slot along its upper face and side and bottom openings, a pivoted needle movable along the slot, a pivoted angled arm, pins carried by the arm and projecting respectively through the side and bottomv openings and adapted to have play therein, and means for communicatin the movement of the angled arm to the nee le.

3. A device of the kind described, comprising a casing having a slotted top, a scale being formed along the margin of said slot, a pivoted needle having its point movable in the slot, the said casing havin an opening in one side and an openin in t e bottom, an angled arm pivoted Wit n the casing, pins carried by the members of said arm, said pins projecting outwardly through the o enings in the side and bottom respective y, the length of said 0 enings being greater than the diameter of t e pins at the point of passage, and a plurality of pivoted levers actuated by the rocking of the angled arm and adapted to actuate the pivoted needle.

4. A device of the kind described, comprising a casing, an indicating-needle pivotally carried by the casing, an angled arm pivotally carried by. the casing, said arm being adapted to be rocked by projections upon a tested surface, and means whereby a rocking of the arm will move the needle, and a bar connected by a ball-and-socket joint to one side. of said casing.

5. A device of the kind describedcomprising acasing, an indicating-needle carried thereby, means for moving said needle, a segmental disk carried by the rear face of the casing and having a ball-socket centrally formed therein, undercut radial shoulders formed on the said disk, and a supportingbar having a portion adapted to rest under said shoulders and provided with a spherical head adapted to rotate in said socket.

6. A device of the kind described, comprising a casing having an int ating-needle pivotally carried thereby, and having openings formed therein, an angled arm ivoted in the casing, projecting pins carrie by the said arm, said pins extending through the said openings and adapted to move along said openings, a pivoted lever having one end in engagement with a member of said arm, a second pivoted lever having a nose adjacent its pivotal point, a roller carried by said nose and in engagement with the other end of the first-mentioned lever, a pin carried by the needle adapted to be engaged by the secondmentioned lever, and a spring adapted to return and hold the parts in their normal position.

JACOB SIGRIST. Witnesses:

EDWARD WALLIN, HARRY J. DALZELL. 

